Aloha all, my DC refrigerator is in need of replacement and I was wanting some input on different systems. The DC unit stayed at a constant cool and never really got cold. It seems the AC/DC units I look at have DC compressors with an AC option. Any one use these? Any one use a basic 110 volt fridge. Mahalo for your input.

I have a standard 110v household fridge that was installed by the previous owner, including a 2500 watt inverter.
So far it has worked out fine. Boat originally had 2 6v batteries as the inverter bank. That worked for weekending.
I changed to 4 6 v batteries ad so far we have been cruising for 8 weeks and it is working out fine.
When we are anchored for one night, battery power is enough, we don't run the genny. 2 nights probably not either unless the previous day's run was very short (less than 3 hours).
So far on this cruise we have only logged about 8 genny hours.
Hope this helps.
Jay

I replaced mine with a vitrifrigo unit from Defender.Max draw is 2.8amps and it fits under the counter like the original propane unit. The admiral said to get rid of everything that used propane including the stove and oven. They have been replaced with electric. My grill on the aft deck uses the disposable canisters.

We have three DC units on board, two fridges and a freezer. All use Danfoss compressors. The most efficient is the Isotherm 130 litre fridge - no icebox. It's an underbench fully self-contained unit and averages about 10ah per day - at 24V. At night it runs in fan-only mode virtually all night. The smaller one -a 70 litre drinks fridge - is not as efficient. Could be because it gets opened more often!

My boat has a Nova Kool AC/DC refrigerator and it works fine. Set it too cold and it will easily freeze the contents of the refrigerator. It's designed for the limited power available on a cruising boat and it's pretty efficient.

Isotherm is the brand of AC/DC refregerator on my previous boat and it worked well also. Isotherm and Nova Kool have good products and good reputations.

If you're installing it in a boat that won't have a genset running 24/7, I would recommend a marine AC/DC refrigerator for efficiency and longevity.

I have an apartment-sized household fridge (Korean eWave) that I think is around 11-12cf. Installed it maybe 8 years ago to replace a same-size older unit that consumed a lot more power. I think this one is around 1.2a 120VAC (from memory). I added a muffin fan in the cabinetry in the back to pull air from underneath and some insulation panels on the side. I think the cost was around $150? I have a 3KW inverter with 1200AH of large AGMs that's always on, so for me it was a cost-effective solution.